proportional valve group modules pvsk - indi.nldanfoss introduces pvsk-modules with integrated...

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Technical Information

Proportional Valve Group ModulesPVSK

powersolutions.danfoss.com

Revision history Table of revisions

Date Changed Rev

May 2014 Converted to Danfoss layout – DITA CMS BC

Dec 2010 New back cover BB

Jan 2010 Drawings changed BA

Jan 2010 Japan location AB

Jun 2004 First edition AA

Technical Information PVSK module with integrated diverter valve and P-disconnect function

2 520L0556 • Rev BC • May 2014

Introduction

Specification and code number for PVSK modules............................................................................................................. 4

Specification and code numbers for PVSK spools................................................................................................................ 5

PVSK function

PVSK characteristics.........................................................................................................................................................................7

Dimensions

Stay bolt set, PVAS for PVSK..........................................................................................................................................................9

Specifications


Contents

520L0556 • Rev BC • May 2014 3

Danfoss introduces PVSK-modules with integrated diverter valve and P-disconnect function.

The module is intended for cranes, telescope lifts and other applications that have special demands on

functionality and safety.

The PVSK-module can be integrated in PVG 32 valve groups for open- as well as closed-center systems.

PVSK PVSK spool

Functions of the PVSK-module:

• When the diverter valve is in neutral position, there is no pressure (only tank pressure) in the P-

channel of the valve group.

• When the diverter valve spool is actuated in A-direction, it enables the basic modules in the PVG-

group to receive pump flow supply.

• When the diverter valve spool is actuated in B-direction, it enables the (High Pressure Carry Over)

HPCO-port in the PVSK module and the P-cannel in the valve group to receive pump flow supply.

Specification and code number for PVSK modules

Specification and code number for PVSK modules

Symbol Description Code no.

Open and closed center inlet with pilot supply for electrical

actuation

Max. pump pressure 350 bar [5076 psi]

Max. pump flow 120 l/min [31.7 US gal/min]

P = ¾”; HPCO = ¾”

157B6961


Introduction

4 520L0556 • Rev BC • May 2014

Specification and code numbers for PVSK spools

Specification and code number for PVSK spools

Symbol Description Code no.

4 way - 3 position spool for fixed displacement pump

HPCO flow 40 l/min [10.57 US gal/min]

Open neutral position P T

157B9657*

4 way - 3 position spool for fixed displacement pump

HPCO flow 40 l/min [10.57 US gal/min]

Closed neutral position P T

157B9658*

* PVSK spool must be option mounted.


Introduction

520L0556 • Rev BC • May 2014 5

PVSK sectional view

V310135.A

P T

HPCO P

P PVB

PHPCO

HPCO P

P PVB HPCO

T T

P

T T

P

T T

P

As the PVSK-module is provided with pump (P) and HPCO (High Pressure Carry Over) connections, the

standard pump connection in PVP, PVPV or PVPM must be sealed with a steel plug (see example on page

6). Note that the steel plug is not included upon delivery. In neutral position, the spool in the PVSK-

module interrupts the connection from the pump to the P-channel in the valve group. This not only

ensures a low pressure (tank pressure) in the P-channel, but also a low pressure-drop in flow circulating

between pump and tank (see PVSK characteristics on page 7).

As the PVSK-module replaces endplate PVS/PVSI, the code number field (field 11) in the specification

sheet must be left open. In general, the diverter function must be specified as a working function PVB,

which means that PVE, PVSK spool and PVM must be specified separately (see PVG 32 specification sheet

Specifications on page 10).

To ensure an adequate supply to the PVE pilot reduction valve, the tank channel of PVSK includes a

backpressure valve. In open-centre systems, the pump flow must be min. 40 l/min (10.57 US gal/min) to

maintain a sufficient pressure-drop across the backpressure valve.


PVSK function

6 520L0556 • Rev BC • May 2014

As the PVSK-module has an integrated pilot oil supply, always use standard PVP 32 without pilot oil

supply in PVG 32 valve groups.

PVSK characteristics

Pressure drop P T; PVSK spool in neutral position Pressure drop P T in PVP


PVSK function

520L0556 • Rev BC • May 2014 7

V310126.A

[1.46]

23[0.91]

85

.5[3

.36

6]

A1

B1

A2

B2

A3

B3

A4

B4

16.5[0.650]

12[0.47]

48[1.89]

23[0.91]

24[0.94]

69

.5[2

.73

6]

36

[1.4

1]

36

.5[1

.43

7]

27

.5[1

.08

3]

35

[1.3

8]

22[0.87]

95

[3.7

4]

48[1.89]

LL

1

2

24[0.94]

P

HPCO

24

[0.8

9]

62

[2.4

4]

24

[0.8

9]

T

Because of limited space conditions, PVE and PVM on the work sections have to be mounted as shown on

the above drawing.


Dimensions

8 520L0556 • Rev BC • May 2014

Stay bolt set, PVAS for PVSK

Qty, Basic modules L1 L2 Code no. Weight

kg [lb]

1 95 165 157B8021 0.25 [0.55]

2 143 213 157B8022 0.30 [0.66]

3 191 262 157B8023 0.35 [0.77]

4 239 311 157B8024 0.45 [0.99]

5 287 360 157B8025 0.50 [1.10]

6 335 409 157B8026 0.55 [1.21]

7 383 458 157B8027 0.65 [1.43]

8 431 507 157B8028 0.70 [1.54]

9 479 551 157B8029 0.75 [1.65]

10 528 600 157B8030 0.85 [1.87]


Dimensions

520L0556 • Rev BC • May 2014 9

PVG 32 specification sheet


Specifications

10 520L0556 • Rev BC • May 2014

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